波函数

This paper dissertates the mathematic property of wavelet basis function and their influence to application.

针对不同的分析信号、信号不同的时频结构、不同的分析目的，论述了选取小波基函数和小波变换的基本原则。

The envelope method of signal based on the Morlet wavelet as well as the relativity methods based on the curve of Gauss function and energy is used to analyze and calculate that the simulative exploration system of tiny terrain incepting the returning echo of ultrasonic,and the spacial position of echo headstream can be attained accurately.

利用Morlet小波信号包络和高斯函数曲线及能量相关性方法对拟设计的微地形探测系统接收到的超声波回波信号进行分析与计算，能准确获得回波源的空间位置。

The key technology of wavelet deˉnoising is how to choose threshold and thresholding function, which is diˉ rectly related to the filtering effect, but in nowadays the discus sion is mainly based on offˉline analysis.

在使用小波域阈值滤波方法消除光纤陀螺输出噪声时，阈值的确定和阈值函数的选取是两个关键问题，它们直接关系到小波滤波的滤波效果，目前关于此方面的讨论较多基于离线分析。

Regarding to the Mechanical wave on Physics teaching, the traditional method usually fail to offer a direct and clear description and demonstration on the effectiveness of Mechanical wave, for this reason the MathCAD software has been adopted, with the various functions the MathCAD software offers, such as calculation, function chart drawing and cartoon designing, men can describe and demonstrate exactly how the Mechanical wave transmits, intervenes and superposes, and define and research the Doppler effect.

物理学在处理机械波的教学过程中，传统方法读其现象的描绘和演示不直观也不方便，现利用MathCAD提供的强大数值计算、函数图像创建和快速灵活的动画设计功能对机械波的传播、干涉和迭加进行了精确描述和动画演示，并对阻尼

Compared with traditional wavelets and wavelet packets, COWB and COWP have not only better frequency localization, but also waveshape variation.

并指出这种正交小波基的混合不同于2尺度正交小波基的混合，因为它可以来自于同一正交尺度函数。

In recent year, the receiver function method has become an important method for inversing crustal thickness, whose main process is to use the travel time and amplitude difference between the direct P and P-to-S at Moho discontinuity to inverse the crustal structure and thickness.

近年来，接收函数已经成为一种重要的计算地壳厚度的产法，它是利用直达P波和Moho面转换S波震相的到时和振幅差来反演计算地壳的厚度和速度结构的。

Then the model is used to analyze the filter characteristics in the frequency wavenumber domain and the spatial-temporal domain.

分析了300km高度3维传输函数在频率波数域的特性，并以近地面单位脉冲点源为激发源，得到了内重力波在3维空间中的时空分布。

Each component of the tensors representing the reflection and refraction at the interfaces were expressed in the form of upgoing and downgoing wave.

给出了利用上行波和下行波方式表达的界面反射和折射张量函数及其各分量。

Based on Noblesse s Slender Ship Theory, where the variables are separate by expanding exponential function, the wave resistance formulae of a trimaran are obtained.

为快速优化三体船的片体位置，基于Noblesse细长体理论，按照一阶Kochin函数的表达式，在指数函数展开分离变量方法的基础上，本文推导了三体船兴波阻力的计算公式，并根据这些公式实现了三体船兴波阻力的快速计算。

All available three-component time series are used to extract the Rayleigh and Love waves. The Signal-to-Noise Ratio at different periods and the azimuth distribution of the inter-station pairs with high SNR are discussed.

通过对三个分量记录的相关运算，获得了Rayleigh波和Love波的经验格林函数，分析了其信噪比随周期的变化和高信噪比台站对的方位分布。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。